Air-mixer for gasolene-engines.



D. H. NASl-L AIR MIXER FOR GASOLENE ENGINES.

APPLICATION FILED JAN. 23. I917- Patented May 7 1918.

2 SHEETS-SHEET 1 D. H. NASH.

AIR MIXER FOR GASOLENE ENGINES.

APPLICATION FILED 1AN.23. 1911.

1,265A84. Patented May 7,1918.

2 SHEETS-SHEET 2.

DAVID E. NASH, OF CHURCH ROAD, VIRGINIA.

AIR-MIXER FOR GASOLENE-ENGINES.

Specification of Letters Patent.

Patented May '3 1918..

Application filed January 23, 1917. Serial No. 143,991.

' To all whom it may concern:

Be it known that 1, DAVID H. NASH, a citizen of the United States, residing at Church Road, in the county of Dinwiddie and State of Virginia, have invented certain new and useful Improvements in Air- Mixers ,for Gasolene-Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which'it appertains to make and use the same.

This invention relates to an air mixer for gasolene engines and has for one of its objects the provision of a device of this character, whereby air will be automatically fed to the manifold of the engine as the speed thereof increases.

Another object of this invention is to provide aheat conducting pipe connected to the manifold and adapted toreceive heated air about the exhaust pipe of the engine and having means therein so connected to the engine, whereby as the speed of the engine increases, the heated air will be fed to the manifold so as to give greater power and ipeed to the engine upon the same amount of uel.

A further object of this invention is to provide a valve within the heat conducting pipe and connected to a governor that is driven by the engine, whereby as the speed of the engine is increased, the valve will be cf plened admitting heated air to the mani- A still further object of this invention is the provision of an air mixer for gasolene engines of the above stated'character, which shall be simple, durable and efficient, and which may be manufactured and sold at a comparatively low cost.

With these and other objects in view as will become more apparent as the description proceeds, the invention consists of certain novel features of construction, combination and arrangement of parts as will be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference will be had to the following description and accompanying drawings, in which:

Figure l is a" side-elevation of an air mixer for gasolene engines constructed in accordance with my invention, illustrating it applied to an internal combustion engine,

Fig. 2 is a top plan view of the same.

Fig. 3 is a fragmentary sectional-v ew through the inlet manifold,

Fig. 4 is a side elevation of the air valve controlling mechanism removed from: the engine.

Referring in detail to the drawings, the

numeral 1 indicates as an entirety, 2111 111- ternal combustion engine used principally upon automobiles having the usual manifold- 2, to which the carbureter 3.i syconnected. Mounted upon the/forward end of the engine 1 is the usual fan 4 carried by the fan shaft 5 for cooling the engine. The engine 1 is mounted upon the automobile in the usual manner and has my invention applied thereto. 4

The manifold 2 has oppositely disposed openings 6 to receive one end of a heat conducting pipe 7 which has formed thereon a collar 8, which abuts the manifold land has its ends internally screwthreaded to re- ,ceive a threaded plug 9 which cooperateswith the collar 8 in securing the pipe 7 into the openings 6 of the manifold 2. The heat conducting pipe 7 is bent at right angles and extends upwardly and has its uppermost end flared as illustrated at 10 to par tially receive the exhaust pipe 11 of the engine l and is slightly spaced therefrom to permit air to pass into the flared end 510 about the exhaust pipe so as to become thoroughly heated. The pipe 7 is providc'diin its lowermost wall within the manifoldQ- within the manifold 2 and becomes thor-. oughly mixed with the fuel from the carbu-F reter 3 as it passes upwardly through the manifold into the cylinders of the engine. The pipe 7 is also provided with a plurality of small perforations 13 for permitting the heated air to enter the manifold. A butt-erfly valve 14 is located within the pipe 7 adjacent the manifold 2 and has secured or connected thereto a rod 15 which extends rearwardly through the dash 16 of the automobile whereby the pipe 7 may be opened and closed to control the flow of heated air through the pipe 7 into the manifold 2.

A hearing 17 has formed thereon legs 18 and 19. The leg 18 is secured to the bolt 20, which secures the valve covering plate 21 to the engine and the arm 19is secured to the bolt 22---which aids with other bolts in securing the crank case 23 to the cylinders "of the engine 1. A rod 24 is journaled in the bearing 17 and has connected to one end thereof a rod 25 which is in turn pivoted ends of the arms are pivoted to a rod 34 which is journaled in a bearing 35. The bearing 35 has an arm 36 formed thereon, which is secured to a bolt 37 upon the breather ipe or oil filling pi e on the engine 1. ecured to the end 0 the shaft 34 is a pulley 38, which has thereon an-endless belt 39 that surrounds a pulley 40 upon the fan shaft 5. The fan shaft 5 is driven by a belt 41 connected to the crank shaft of the engine. The spring 28 normally holds the rod 24 and governor in its normal position so as to have the valve 27 ina closed position, preventing the heated air from passing through the pipe 7 into the manifold 2.

After the engine 1 reaches a certain speed and it increases its speed from this point,

the governor expands in the usual manner drawing. upon the shaft or red 24 against the tension of the spring 28 opening the valve 27, permitting the heated air in the pipe 7 to pass into the manifold 2. The heated air is drawn through the pipe 7, when the valve 27 is' opened, by the suction of the cylinders of the engine 1. As the heated air enters the manifold 2, it mixes with the. fuel from the carbureter 3 prior to entering the cylinders, which will give the same amount of fuel, an

engine increased speed and ower upon the also make a smoother running engine. As the speed of the engine decreases, the shaft 24 returns to its normal position under the influence of the spring 28, closing the valve 27 cutting off the supply of the heated air from the pipe 7, thus giving the engine a richer mix- Copies of this patent may be obtained for ture of fuel when running at a lower rate of speed, which is essential to obtaining correct running and good results from the enme. g When not desiring to use the air mixer or to prevent theheat'ed air from passing into the manifold 2 when the engine is running at a high rate of speed, the rod 15 may be rotated so as to close the'valve 14, thus preventing any air from entering the manifold through the pipe 7.. p

While I have shown and described the preferred embodiment of my inventlon, it

will be understood that certain minor fold, said air intake pipe having a plurality of apertures therein and disposed within the manifold to permit the heated air in the air intake pipe to enter; the manifold, a valve located in the air intake pipe, a supporting structure carried by the engine, brackets carried by the supporting structure, a rod slidable in said brackets, an arm secured to said rod and pivoted to the valve, a governor swivelly connected to said rod, a shaft journaled to the supporting structure and secured to the governor, means rotating said shaft by the engine, adjusting nuts threaded to one end of the rods, and a coil spring surrounding the rods and having one end disposed against one of the brackets and its other end secured between the adjusting nuts for normally urging the rod forwardly to close the valve.

In testimony whereof I aflix my signature in presence of two witnesses.

DAVID H. NASH.

Witnesses:

S. H. PA'I'IILLO, W. H. Nxsn.

five, cents each, byaddressing the commissioner of Patents, Washington, D. 0. 

